The Uruguayan midfielder was signed by former manager Iain Dowie in the summer but only played 57 minutes for the first team against Portsmouth in September.
His agent is now coming to England to sort out the termination of his loan contract.
Gerardo Rebajda said,"I am travelling to England to end the contract of Omar Pouso at Charlton Athletic because the player has told me that he doesn't want to continue in a team in which he doesn't play, because that takes chances away from him for being recalled to the Uruguayan national team."